Smoke-consuming apparatus for boiler and other furnaces



2 Sheets-Sheet 1.

(No Model.)

W. SMITH. SMOKE GONSUMING APPARATUS PQR BOILER 0R OTHER PURNAGES.

ted July 26, 1892.

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(No Model.) 2 Sheets-Sheet 2.`

` W. SMITH. SMOKE GONSUMING APPARATUS FOR BOILER OR OTHER PURNACES.

170.479,767. Patented July 26, 1892.

MTNESEEE: INVNTQ @www av Y 1g/ "L m] y/fifi@ gf UNITED STATES PATENTOFFICE.

WESLEY SMITH, OF TOLEDO, OHIO, ASSIGNOR, BY DIRECT AND MESNE ASSIGN-MENTS, TO CHARLES W. MORRIS, JR., TRUSTEE, AND CHARLES IV. MOR- RIS, OFBOSTON, MASSACHUSETTS.

i SMOKlE-CONSUMING APPARATUS FOR BOILER AND OTHER FURNACES.

SPECIFICATION forming part of Letters Patent No. 479,767, dated July 26,1892.

.Application filed March 10, 1892.

To coll whom it may con/cern,.-

Beit known that I, WESLEY SMITH, of Toledo, in the county of Lucas andState of Ohio, have invented certain new and useful Improvements inSmoke-Consuming Apparatus for Boiler and other Furances, of which thefollowing is a specification.

This invention has for its object to promote the combustion of fuel infire-boxes or fur- 1 o naces, and particularly the fire-boxes ofsteamboilers, either stationary or locomotive.

The invention consists in the combination, with a furnace or fire-box,an air-compressor, and a conduit arranged to conduct compressed air tothe fire-box and to subject said air to heat, of another conduitarranged to conduct external air at ordinary atmospheric pressure to thefire-box, the last-mentioned conduit being arranged to subject the airpassing 2o through it to heat and conduct such heated air to the pointwhere the compressed air is delivered by the compressed-air conduit, thearrangement being such that the jet of compressed air acts somewhat onthe principle of 2 5 a jet of steam in an injector to induce a flow ofair under ordinary pressure, the result being the supplying of a largevolume of heated air to the fire-box.

The invention also consists in certain improvements relating to theconstruction and arrangement of the apparatus involved, all of which Iwill now proceed to describe and claim.

In the accompanying drawings, forming 3 5 part of this specification,Figure 1 represents a side elevation and partial section of a locomotiveprovided with apparatus embodying my invention. Fig. 2 represents asection on line 2 2, Fig. 1. Fig. 2n represents a section 4o on line 2a2, Fig. 2. Fig. 3 representsa rear elevation of the tire-box of thelocomotive shown in Fig. 1. Fig. 4 represents a section on line 4 4f,Fig. 1. Fig. 5 represents a longitudinal section of the fire-box and aportion of the boiler. Fig. 6 represents a longitudinal section of thefire-box and casing of astationary boiler, the boiler being shown inelevation. Fig. 7 represents an end View of the casing of the fire-boxand boiler shown in 5o Fig. 6.

Serial No. 424,388. (No model.)

The same let-ters of reference indicate the same parts in all thefigures.

I have shown my invention in Figs. 1, 2, 3,

4, and 5 applied to the fire-box of a locomotive, and I will firstdescribe said appliance with reference to said figures.

a represents the furnace or tire-box, which is or may be of the usualgeneral construction.

b represents an air pump or compressor, y which may be of any suitableconstruction 6o and supported at any suitable point, said pump beingherein shown as provided with an air-inlet b.

b2 represents a conduit for compressed air extending from thecompressorb and communicating with the interior of the lire-box, so thatthe air which 'is compressed and set in motion by the pump b will enterthe fire-box to promote the combustion of the fuel. The compressed-airconduit is arranged so that it 7o will subject the air within it to heatbefore the air is delivered to the tire-box, so that the compressed airenters the fire-box in a heated condition. Any suitable means maybe usedto heat the air,and for the purposes of myinvention it may be assumedthat the conduit b2 passes through a portion of the lire-box, although Iprefer to provide a casing b3 on the exteriorof the fire-box throughwhich the compressed-air conduit passes, said casing being 8o arrangedto receive heat from `the fire-box either by radiation from the wallagainst which the casing is placed orthroughfluesb4,connect ing theinterior of the casing b3 with the interior of the iire-box, as shown inFig. 5. When 8 5 the casing b3 is employed, I prefer to bolt or rivet itsecurely to one of the walls of the fire-box by means of flanges formedon said if l casing and to extend the conduit h2 back and forth throughthe casing in a suitable num- 9o ber of return-bends, as indicated indotted lines in Fig. 3, for the purpose of giving the conduit asufficient exposure to the heat. The conduit b2 terminates at itsdelivering end in a nozzle b5, which is arranged to deliver a jet ofcompressed air to the fire-box, said nozzle being preferably of the formshown in Fig. 2a, and arranged Within the tapering or conical nozzle c,which forms the delivering end of the secondary air-conduit, which willroo be presently described, said nozzles c and h5 resembling in theirrelative arrangement and form an injector, the jet of compressed airdelivered by the nozzle b5 inducing a flow of air through the nozzle cand through the secondary conduit.

In Figs. l and 2 I have shown the conduit b2 as divided at h6, onedivision communicating with the casing b3 at one end and the other withthe casing b3 at the other end of the fire-box, so that compressed airis supplied simultaneonsly at both ends of the nre-box. In Figs. 2 and 3I show each compressed-air conduit as provided with a series of nozzlesb5, so that airis delivered to the lire-box from each of the conduits ina series of jets or blasts. The supply of compressed air delivered byeach nozzle may be regulated by means of ascreW-threaded spindle 197.(Shown in Fig. 2a.)

For the purpose of supplying a large volume of heated air and ofutilizing the force of the compressed air to inducea current of air atordinary atmospheric pressure into the furnace, I provide a secondaryair-conduit, which, as already stated, terminates in a nozzle c,receiving the compressed-air nozzle b5. In the construction shown inFigs. l, 2, 3, and 4 the secondary conduit comprises a tube c',surrounding the smoke-pipe of the locomotive and adapted to receive airthrough perforations or other suitableopeningsinside thetube, a jacketor casing c2, partly surrounding the smoke-arch of the locomotive, andsuitably attached to the boiler or its casing, and pipes c3 c3,extending from said jacket at opposite sides of the boiler to thenozzles c, there being as many of the latter as there are compressed-airnozzles b5. The tube c', jacket c2, pipes c3, and nozzles c constitute aconduit which receives air around the smoke-stack and conducts itdownwardly along the heated surface of the smoke-stack, over the heatedsurface of the smoke-arch, and along the sides of the boiler, so thateach nozzle c delivers a supply of heated air to the space surroundingthe delivering ends ofthe compressed-air'nozzles h5. The jets ofcompressed air delivered by the nozzles b5 induce a rapid ow of air fromthe said secondary conduit, so that each nozzle c delivers to theire-boxalarge volume of air, which results from a commingling of thecompressed air furnished by the compressed-air conduit and the airfurnished by the secondary conduit, the entire volume being highlyheated.

It will be seen that in the construction above described the air isheated without materially drawing on the resources of the tirebox, theair in the secondary conduit being heated entirely by the waste heatfrom the fire-box, While the air in the compressed-air conduit may beheated either by Waste heat or by a comparatively small portion of thedirect heat from the tire-box diverted into the casings b3. When thecasings b3 and the ue b4, connecting the same with the interior oflire-box, are employed, I prefer .to connect each casing b3 with one ormore of the nozzles cby means of one or more short tubes d, Fig. 3, saidconnections causing an upward draft quantities of the heated gases andproducts of combustion from the tire-box through the iiues b4 into thecasings b3 to insure the heating of the air in the portions of thecompressed-air conduits in said casings, it being understood that theproducts of combustion that enter the casings b3 will pass through theconnections d to the nozzles @and back into the firebox.

In Figs. 6 and 7 IshoWa stationary tire-box a', arranged in suitablerelation to a stationary boiler e. In this case the compressed air issupplied by a compressor b, which is connected by a pipe b9 with one ormore nozzles b5, arranged to deliver compressed air to the fire-box,said nozzles entering the front wall of the tire-box. The compressed-airconduit b9 passes through the boiler-casing, so that it is subjected tothe heat from the tire-box and from the boiler, the compressed air beingto the atmosphere at 010 outside-of the casing` of the boiler, andpasses through the said y casing and along through the flue or passage,

through which the heat passes through the l fire-box to the chimney, andpreferably over the fire-box, as shown in Fig. 6, said pipe ter- .1minating in one or more nozzles or outlets cl2, j arranged to deliverair at the delivering ends of the compressed-airnozzles b5. The conduitci is preferably provided with two or more return-bends, as shown atcl3, in order to give said conduit a greater area of surface exposed tothe heat.

It will be seen that in this embodiment of my invention there is nodiiference in principle from that previously described, the action beingessentially the same in both forms.

In Fig. 6 I have shown in the bridge-wall a5 at the rear of the fire-boxa chamber a, which receives heated compressed air through a branch pipe0,7, connected with the cornpressed-air conduit, the compressed airentering the chamber 0.6 being delivered to the tire-box throughorifices a8 in the bridge-Wall.

I claiml. The combination, with a furnace or firebox, of anair-compressor, a conduit connecting said compressor with the interiorof the tire-box, and asecondary air-conduit arranged to conduct externalair to the delivering end of the compressed-air conduit, said secondaryconduit being arranged to subject the air passing through it to heat, asset forth.

2. The combination, With a furnace or rebox, of an air-compressor, aconduit connecting said compressor with the interior of the ire-box andarranged to subject the air pass- IOO ITO

1o passing through them, and an air-compressor connected with theconduit communicating Withthe inner nozzle, as set forth.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing Witnesses, this 9th day of 15 March, A. D.1892.

WESLEY SMITH. lVitnesses:

C. F. BROWN, M. W. JACKSON.

